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sparc32: Implement hard_smp_processor_id() via instruction patching.

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This is the last non-trivial user of btfixup.

Like sparc64, use a special patch section to resolve the various
implementations of how to read the current CPU's ID when we don't
have current_thread_info()->cpu necessarily available.

Signed-off-by: David S. Miller <davem@davemloft.net>
Tested-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
David S. Miller 2012-05-13 23:09:04 -07:00
parent 5d83d66635
commit c68e5d39a5
10 changed files with 99 additions and 175 deletions
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2
arch/sparc/kernel/kernel.h
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@ -80,8 +80,6 @@ extern unsigned int patchme_maybe_smp_msg[];
extern void floppy_hardint(void);
/* trampoline_32.S */
extern int __smp4m_processor_id(void);
extern int __smp4d_processor_id(void);
extern unsigned long sun4m_cpu_startup;
extern unsigned long sun4d_cpu_startup;